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淹水程度对长江滩地枫杨导管及微纤丝角的影响
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摘要:
运用体视学方法,对枫杨导管、微纤丝角变异规律进行研究.结果表明,枫杨导管长宽比约为3.2,水淹程度不同的两组间的导管平均直径在径、轴向上变化有一定差异.枫杨微纤维角由髓心向外逐渐变小,与年轮显著相关,但水淹程度不同的两组间微纤丝角在轴向上的变化趋势不一致.在0.05水平上,经T-检验水淹程度不同的两组间的导管平均直径、形状因子、单位体积中导管所占面积及微纤丝角差异不显著.
关键词:  淹水程度  滩地枫杨  导管  微纤丝角
DOI:
修订日期:2003-11-10
基金项目:国家林业科技攻关项目
Effects of Flooding Degree upon the Vessel and Microfibrillar Angle of Pterocarya stenoptera C.DC.Grown in the Beaches of Changjiang River
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Abstract:
The variability of the vessel and microfibrillar angle(FA) of Pterocarya stenoptera was studied in stereology.The result indicated that the vessel length to vessel width ratio is 3.2, vessel diameter of the two groups vary differently in radial and longitudinal. The FA becomes smaller and smaller from the pith outward and the relationship between it and cambium age correlates remarkably, while the FA varies differently in longitudinal. The differences of vessel diameter, form factor of vessel, area of vessel per unite volume and FA between the two groups are not significant at 0.05 level.
Key words:  flooding degree,Pterocarya stenoptera grown in the beachs,vessel,microfibrillar angle

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